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Eating fast food and processed pastries could increase the risk of depression, according to a study in Public Health Nutrition.

More than just sad

Everyone goes through ups and downs. But being sad is very different than being depressed. Whereas sadness can lift when your situation changes, depression comes with a host of symptoms that may stick around for months or even years, long after the event that may have triggered it.

Depression symptoms can vary widely, and it’s sometimes hard for a depressed person to distinguish between everyday feelings and a clinical condition. People with depression may be more tired than usual, have decreased libido, an increased or decreased appetite, difficulty concentrating, and a loss in interest in activities that used to be pleasurable.

What can diet do?

Omega-3 fatty acids found in cold water fish can help ease depression in some people, and getting enough B vitamins can help correct deficiencies that may contribute to depression. But not as much is known about the role of certain types of food, especially less nutritious foods, on mood and well-being.

A Spanish study including 8,964 people looked at the connection between eating junk food and the chances of developing depression. The people reported on how often they ate fast foods—including hamburgers, pizza, and sausages—and processed pastries including muffins, doughnuts, and croissants.

Over the course of six years, researchers noted how many people developed depression. Here’s what they found:

People who ate the most fast food were 36% more likely to develop depression than those who ate the least.

Eating more processed pastries increased the risk of depression by 38%.

This information joins a growing body of evidence tying inflammation in the body to depression risk. Processed foods may also increase cardiovascular disease risk and markers of inflammation in the body. The authors suggested that inflammation might be partially responsible for the increase in depression risk seen in the study.

“Public health nutrition policies should take into account the detrimental effects of these kinds of products not only on cardiovascular disease and its related risk factors but also on mental health,” commented lead study author, Almudena Sanchez-Villegas.

Eat to beat depression

In addition to bypassing junk food, these healthy eating habits may help you sidestep depression:

Get enough protein. The amino acids in protein-rich foods are the building blocks for many “happy” chemicals in the brain. Focus on fish, lean meats, eggs, and legumes.

Get your Bs: Folic acid, vitamin B6, and vitamin B12 all play a role in maintaining a healthy mood. Black-eyed peas, broccoli, shellfish, tuna, lamb, lean beef, and yogurt are all rich sources of B vitamins.

(Public Health Nutr 2012;doi:10.1017/S1368980011001856)

Kimberly Beauchamp, ND, received her doctoral degree from Bastyr University, the nation’s premier academic institution for science-based natural medicine. She co-founded South County Naturopaths in Wakefield, RI, where she practiced whole family care with an emphasis on nutritional counseling, herbal medicine, detoxification, and food allergy identification and treatment. Her blog, Eat Happy, helps take the drama out of healthy eating with real food recipes and nutrition news that you can use. Dr. Beauchamp is a regular contributor to Healthnotes Newswire.

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